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Typescript API Safety

Category: Engineering  ·  Sub-category: languages  ·  Last updated:
lang:typescript
This skill should be used when writing API endpoints, handling external data, validating HTTP requests or responses, parsing user input, working with environment variables, designing type-safe API boundaries, integrating Zod for runtime validation, implementing Fastify with type providers, sharing types in monorepos, or setting up parse-don't-validate patterns. Trigger on: "API boundary", "parse don't validate", "Zod schema", "runtime validation", "validate request body", "safe parse", "schema-first", "type-safe API", "Fastify type provider", "shared types monorepo", "validate environment variables", "external data", "unknown input", "z.infer", "request validation", "response validation", "API contract".

From the source SKILL.md

The most dangerous data in any application is the data entering from the outside world. API responses, request bodies, environment variables, and file contents are all unknown at runtime — no matter what your TypeScript types say. The solution is a single guiding principle: parse, don't validate.

What this skill does

Typescript API Safety is a community-contributed Claude Code skill in the languages sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/typescript-api-safety/ and loads when your prompt matches the skill's trigger.

Who uses this skill

The Typescript API Safety Claude Code skill is built for software engineers, backend developers, full-stack teams, and technical leads building and maintaining production systems. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 69,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/typescript-api-safety
curl -L https://claudskills.com/skills/typescript-api-safety/SKILL.md \
  -o ~/.claude/skills/typescript-api-safety/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/typescript-api-safety/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/typescript-api-safety/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\typescript-api-safety\SKILL.md on Windows. See the full install guide for step-by-step instructions.

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Attribution & license

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Browse all Engineering skills in the ClaudSkills registry, or explore these other picks from the same category:

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Part of ClaudSkills — the open registry for Claude Skills & Claude Code Skills.  ·  What's New  ·  Install guide  ·  About  ·  llms.txt

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